SODIUM PERSULFATE

SODIUM PERSULFATE

CAS NO.    7775-27-1    
SODIUM PERSULFATE 

EINECS NO.    231-892-1
FORMULA    Na2S2O8
MOL WT.    238.10
H.S.CODE 2833.40
     
SYNONYMS :  Peroxydisulfuric acid, disodium salt; disodium peroxodisulfate; Sodium peroxydisulfate; Dinatriumperoxodisulfat (German); Peroxodisulfato de disodio (Spanish); Peroxodisulfate de disodium (French); Sodium peroxodisulfate; PERSULPHATES; SODIUM PERSULFATE; SODIUM PERSULPHATE; persulfatedesodium; SodiumPersulphateGr; Natriumperoxodisulfat; SODIUM PEROXODISULFATE; SODIUM PEROXYDISULFATE; SodiumPersulphate,>98%; Sodium peroxidisulfate; Sodium peroxodisulfate; disodium peroxodisulphate; disodium oxidooxysulfonyl sulfate; Disodium [(sulfonatoperoxy)sulfonyl]oxidanide; disodium sulfonatooxy sulfate; Peroxydisulfuric acid, disodium salt; Sodium peroxodisulfate; Peroxydisulfuric acid (((HO)S(O)2)2O2), disodium salt; Peroxydisulfuric acid ([(HO)S(O)2]2O2), sodium salt (1:2); disodium [(sulfonatoperoxy)sulfonyl]oxidanide; Disodium peroxodisulphate; Peroxydisulfuric acid, disodium salt

General Description
A white crystalline solid. Very irritating to skin and eyes. May be toxic by skin absorption. Used as a bleaching agent.

PHYSICAL STATE    White crystalline powder
MELTING POINT    100 C
BOILING POINT     
SPECIFIC GRAVITY    2.4
SOLUBILITY IN WATER    550 (g/l at 20 C)
FLASH POINT    180 C
STABILITY    Stable under ordinary conditions. Moisture sensitive
APPLICATIONS

Sodium persulfate is a strong oxidizing agent and generates free radical used in many applications; polymerization initiator (source of free radicals); etching agent in glass, zinc and PCB manufacturing process; bleaching and textile desizing; decolorizing and deodorizing oils; manufacturing dyes; surface treatment agent of copper; soil conditioner.

APPEARANCE
White crystalline powder
CONTENT    99.0% min
ACTIVE OXYGEN    6.65% min
Cl    0.01% max
Fe    0.002% max
Mn     0.00005% max
Pb     0.001 %
WATER    0.05% max
FREE ACID  0.01% max
TRANSPORTATION
PACKING    25kgs 800kgs in bag,
HAZARD CLASS    5.1 (Packing Group: III)
UN NO.    1505
Sodium persulfate is the inorganic compound with the formula Na2S2O8. It is the sodium salt of peroxydisulfuric acid, H2S2O8, an oxidizing agent. It is a white solid that dissolves in water. It is almost non-hygroscopic and has good shelf-life.
Production
The salt is prepared by the electrolytic oxidation of sodium hydrogen sulfate:
2 NaHSO4 → Na2S2O8 + H2
Oxidation is conducted at a platinum anode.[2] In this way about 165,000 tons were produced in 2005.[3] The standard redox potential of sodium persulfate into hydrogen sulfate is 2.1 V, which is higher than that of hydrogen peroxide (1.8 V) but lower than ozone (2.2 V).[4] The sulfate radical formed in situ has a standard electrode potential of 2.7 V. However, there are a few drawbacks in utilizing platinum anodes to produce the salts; the manufacturing process is inefficient due to oxygen evolution and the product could contain contaminants coming from platinum corrosion (mainly due to extremely oxidizing nature of the sulfate radical). Thus, boron-doped diamond electrodes have been proposed as alternatives to the conventional platinum electrodes.[5]

Applications
It is mainly used as a radical initiator for emulsion polymerization reactions for styrene based polymers such as Acrylonitrile butadiene styrene.[3] Also applicable for accelerated curing of low formaldehyde adhesives.

Other uses
It is a bleach, both standalone (particularly in hair cosmetics) and as a detergent component. It is a replacement for ammonium persulfate in etching mixtures for zinc and printed circuit boards, and is used for pickling of copper and some other metals. It is also used as a soil conditioner and for soil and groundwater remediation[5][6] and in manufacture of dyestuffs, modification of starch, bleach activator, desizing agent for oxidative desizing, etc.

Organic chemistry
Sodium persulfate is a specialized oxidizing agent in chemistry, classically in the Elbs persulfate oxidation and the Boyland–Sims oxidation reactions. It is also used in radical reactions; for example in a synthesis of diapocynin from apocynin where iron(II) sulfate is the radical initiator.

Sodium persulfate appears as a white crystalline solid. Very irritating to skin and eyes. May be toxic by skin absorption. Used as a bleaching agent.

Sodium persulfate Chemical Properties,Uses,Production
Physical and Chemical Properties
Sodium persulfate, also known as sodium peroxydisulfate is a white crystal or crystalline powder, odorless, tasteless. Formula is Na2S2O8, relative molecular mass is 238.13. Gradual decomposition at room temperature, heating or rapidly decompose in ethanol, decomposition to release oxygen and produce sodium pyrosulfate. Moisture and platinum black, silver, lead, iron, copper, magnesium, nickel, manganese and other metal ions or their alloys can promote the decomposition, it decomposes rapidly and emit hydrogen peroxide at high temperature (about 200 ℃). It is soluble in water (70.4 when 20 ℃).
Sodium persulfate has strong oxidizing. There is a strong irritation to the skin, prolonged contacting with the skin can cause allergies, should pay attention to it when operation. Rat oral LD50 is 895mg/kg. It should be Sealed storage. heat the ammonium persulfate and sodium hydroxide or sodium carbonate solution to remove carbon dioxide and ammonia to obtain sodium persulfate in the Laboratory.
Strong oxidants
With strong oxidizing, Sodium persulfate can be used as an g agent, which can oxidize Cr3 +, Mn2 + and so on to the corresponding compound of high oxidation state, when there is the presence of Ag +, which can promote the oxidation reaction. Due to its oxidizing properties, it can be used as a bleaching agent, metal surface treatment agent, chemical reagents, pharmaceutical raw materials, accelerator and initiator of battery and emulsion polymerization.
Uses
Sodium persulfate is used as a bleach, both standalone (particularly in hair cosmetics) and as a detergent component. It is a replacement for ammonium persulfate in etching mixtures for zinc and printed circuit boards, and is used for pickling of copper and some other metals. It is a source of free radicals, making it useful as an initiator for e.g. emulsion polymerization reactions and for accelerated curing of low formaldehyde adhesives. Sodium persulfate is also used as a soil conditioner and in manufacture of dyestuffs, modification of starch, bleach activator, desizing agent for oxidative desizing, etc.
For waste processing in the photographic industry, used as a soft metal surface corrosion agents of the printed circuit board and textile desizing agents, sulfur dyes colorformer.
Preparation method
1. The electrolytic oxidation of the aqueous solution of ammonium sulfate is to obtain ammonium persulfate, and then metathesis reaction with sodium hydroxide, after the expulsion of the ammonia by-product, and then concentrated under reduced pressure, crystallization, drying, to obtain sodium sulfate.
(NH4) 2S2O8 + 2NaOH → Na2S2O8 + 2NH3 + 2H2O.
2. Dithionic acid can be prepared by electrolysis of cold sulfuric acid won, which reacts with alkali and then obtain sodium sulfate.
2HSO4--2e → H2S2O8
H2S2O8 + 2NaOH → Na2S2O8 + 2H2O.
storage
Sodium persulfate is a strong oxidizer and a severe irritant of skin, eyes, and respiratory system. It is almost non-hygroscopic and has particularly good ability to be stored for long time. It is easy and safe to handle. It is not combustible, but releases oxygen easily and assists combustion of other materials.
Conditions/ substances to avoid mixing persulfates with are: moisture, heat, flame, ignition sources, shock, friction, reducing agents, organic material, sodium peroxide, aluminum and powdered metals.
Chemical Properties
White, crystalline powder. Soluble in water; decomposed by alcohol; decomposes in moist air.
Uses
Bleaching and oxidizing agent; promoter for emulsion polymerization reactions.
General Description
A white crystalline solid. Very irritating to skin and eyes. May be toxic by skin absorption. Used as a bleaching agent.

About Sodium Persulfate
High purity Sodium PersulfateSulfate IonSodium Persulfate is a moderately water and acid soluble Sodium source for uses compatible with sulfates. Sulfate compounds are salts or esters of sulfuric acid formed by replacing one or both of the hydrogens with a metal. Most metal sulfate compounds are readily soluble in water for uses such as water treatment, unlike fluorides and oxides which tend to be insoluble. Organometallic forms are soluble in organic solutions and sometimes in both aqueous and organic solutions. Metallic ions can also be dispersed utilizing suspended or coated nanoparticles and deposited utilizing sputtering targets and evaporation materials for uses such as solar cells and fuel cells. Sodium Persulfate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. We also produce Sodium Sulfate Solution. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Sodium persulphate (Na2S2O8) is a chemical compound. It is a strong oxidizer. It is a severe irritant of the skin, eyes, and respiratory system. It is almost non-hygroscopic and has particularly good ability to be stored for long time. It is easy and safe to handle. It is not combustible, but releases oxygen easily and assists combustion of other materials. It is used as a bleach, both standalone (particularly in hair.

Sodium Persulfate 99%
Odor: characteristic
Use: Sodium Persulfate is a moderately water and acid soluble Sodium source for uses compatible with sulfates.Sulfate compounds are salts or esters of sulfuric acid formed by replacing one or both of the hydrogens with a metal. Most metal sulfate compounds are readily soluble in water for uses such as water treatment, unlike fluorides and oxides which tend to be insoluble. Organometallic forms are soluble in organic solutions and sometimes in both aqueous and organic solutions. Metallic ions can also be dispersed utilizing suspended or coated nanoparticles (See also application discussion at Nanotechnology Information and at Quantum Dots) and deposited utilizing sputtering targets and evaporation materials for uses such as solar energy materials and fuel cells. Sodium Persulfate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. We also produce Sodium Sulfate Solution. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards.

Sodium Persulfate
Odor: characteristic
Use: Sodium Persulfate is mostly used as a bleaching agent and detergent component. Other uses include battery depolarizers, in the manufacture of dyestuffs, and in emulsion polymerization.
Application:Sodium persulfate is a strongly oxidizing chemical used as a bleaching and oxidizing agent.

Reactivity Profile
SODIUM PERSULFATE is a strong oxidizing agent. Reacts with many combustible materials and reducing agents, often vigorously enough to start fires or cause explosions [Handling Chemicals Safely 1980 p. 855]. Decomposes gradually under ordinary conditions decomposition is promoted by moisture and heat. Decomposed by alcohol and silver ions.

Description
Sodium Persulfate is used as a promoter for polymerization reactions.

SODIUM PERSULFATE
(SODIUM PEROXYDISULFATE) Na₂S₂O8
Appearance White Crystal Visual
Purity (Na₂S₂O8) Min. %99 (w/w) Iodometric Titration
Active Oxygen Min. %6.65 (w/w) Iodometric Titration
Acid Content Max. %0.10 (w/w) Titration(Reaction with NaOH)
Iron (Fe) Content Max. 5 ppm Colorimetric
Heavy Metals (Fe excluded, Pb content) Max. 5 ppm Turbidimetric
PRODUCT DESCRIPTION
Molecular Weigh : 238.1 kg/kmol
Specific Gravity : 2,590 kg/m3
pH (%5 solution) : 3-5
Thermal Decomposition : ≥65°C
Solubility in Water : 73(25 °C) 86(50 °C) (g/100 g H2O)
APPLICATION
Initiator for the emulsion or solution Polymerization of acrylic monomers, vinyl acetate, vinyl chloride etc. and for the
emulsion co-polymerization of styrene, acrylonitrile, butadiene etc.,
Oxidizing agent, used in cleaning and pickling of metal surface, accelerated curing of low formaldehyde adhesives and
modification of starch, production of binders and coating materials,
Desizing agent and bleach activator,
It is an essential component of bleaching formulations for hair cosmetics.
PACKAGING, STORAGE & SHELF LIFE
25 kgs and 1000 kgs net polyethylene and polypropylene bags. 1000 kgs bag has antistatic properties. It must be stored
in well closed original packing and protected from direct sunlight, heat and humidity. Impurities such as dirt, rust or
traces of metal and reductants may cause catalytic decomposition. It can be stored for 12 months below 30°C. The
product as supplied or in solution needs to be handled with appropriate care.The eye, skin and clothes must be
protected when working with SPS as damp powder or aqueous solution has a bleaching and slightly corroding effect.
SAFETY & PRECAUTIONS
Avoid contact with eyes, skin and clothing. Use with adequate ventilation. Do not swallow. Avoid breathing vapors,
mists or dust. Do not eat, drink or smoke in work area. Prevent contact with combustible or organic materials. Label
containers and keep them tightly closed when not in use. Wash thoroughly after handing. For drinking water
applications, the optimum dosing must be max. 43 mg/L.